Prices shown in currencies other than USA Dollars are estimates based on current exchange rates. We will charge your credit card in USA Dollars on the day your order is shipped, and the conversion to your local currency will be done at the prevailing rate by your credit card issuer.

Shipments outside the USA are declared as “bike parts” for customs purposes and will include the actual amount paid for merchandise and shipping. Jenson USA will not mark your parcel as a “gift”, declare a value lower than the actual price paid, or otherwise prepare false customs information.

FSA has taken their lightweight aluminum OS-99 and wrapped it in a beautiful carbon 3k weave. The resulting carbon stem is not all show with very little go. What FSA ends up with is the OS-99 CSI. A stem that is stiffer and more durable with only a slight weight penalty. Not to imply that the aluminum OS-99 is a noodle, but adding the wrap gives the stem a different character. This one works well for the powerful rider that wants a very stiff front end, or for that rider who appreciates the look of carbon in all the right places.

Titanium hardware

claimed 120g (110mm)

+/-6 degrees

41mm stack height

Jenson USA ships worldwide, including APO/FPO addresses. For a quote, simply add the items you are interested in to your shopping cart and look for the "Shipping Options" box. You don't have to login or create an account to see shipping charges.

Some manufacturers restrict where we can ship their products. If this item has shipping restrictions, they are listed below. If you'd like to buy an item that we cannot ship to your preferred address, we can accept your foreign credit card and ship to a USA address for you.

Get free shipping with your $50 purchase today when you choose Standard Shipping at checkout. Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items